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<div style="text-align:center">
  <h1>
    Sample Angular Client
  </h1>
</div>
<div>
  <button (click)='onLogin()'>Login</button>
  <button (click)='onCallAPI()'>Call API</button>
  <button (click)='onRenewToken()'>Renew Token</button>
  <button (click)='onLogout()'>Logout</button>
</div>
<pre>{{currentUserJson}}</pre>
<div>
  <h2>Messages</h2>
  <ul>
    <li *ngFor='let msg of messages'>{{msg}}</li>
  </ul>
</div>